[one-users] are variables inside the vm template possible?

[Ruben S. Montero]

Hi,

As Javier said this is done in the OpenNebula core. We have filled one
ticket [1] to address this. However, looking at the attributes we do
not need to use this cross parsing for all the variables (e.g. OS,
DISK). Right now we have this for CONTEXT and for the REQUIREMENTS in
a development branch [2]. (For example you can do something like
REQUIREMENTS = $NIC[MAC] = MACS, if you have a custom probe that
generates a MACS attribute for the hosts you can do short of a MAC
pinning, so only VMs with a given MAC runs in a given host)

My proposal: default generation values for port and listen in
GRAPHICS. So if you do not put a port, OpenNebula will automatically
assign 5900+$VMID, and if you do not put a listen OpenNebula will
automatically HOSTNAME of the host where the VM is placed.

What do you think?


Cheers

Ruben

PS: Added this to the ticket [1] if you want to continue the discussion there

REFS:
[1] http://dev.opennebula.org/issues/189
[2] http://dev.opennebula.org/projects/opennebula/repository/show/branches/DEVELOPMENT/Context_Requirements

2010/2/5 Javier Fontan <jfontan at gmail.com>:
> Hello,
>
> Unfortunately it is not python script but it is parsed by OpenNebula
> itself. Only context part substitutes those parameters. The solution
> can come from letting kvm select the vnc port and modifying vmm driver
> to get vnc host/port in poll call (VM monitoring). I don't think that
> is too hard to do. Maybe we can add a ticket as a feature request.
>
> Bye
>
>
> 2010/2/5 Nikola Milutinović <n.milutinovic at levi9.com>:
>> On 2/5/2010 9:04 AM, Michael Fairchild wrote:
>>
>> Hello,
>>   I am wondering if there is any way to use variables inside the vm
>> definition, such as
>>
>> GRAPHICS = [
>>     type = "vnc",
>>     listen = "0.0.0.0",
>>     port = "590$VMID"
>> ]
>>
>> It should be. We are definitely using those for contextualization.
>>
>> CONTEXT = [
>>    ...
>>    id = $VMID,
>> ]
>>
>> That template is basically a Python script, if I understand correctly, so
>> you can even place a program inside.
>>
>> Nix.
>> --
>> Met vriendelijke groet / Kind regards,
>> Nikola Milutinovic
>> Sr Java Developer
>> Levi9 Global Sourcing
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>
>
>
> --
> Javier Fontan, Grid & Virtualization Technology Engineer/Researcher
> DSA Research Group: http://dsa-research.org
> Globus GridWay Metascheduler: http://www.GridWay.org
> OpenNebula Virtual Infrastructure Engine: http://www.OpenNebula.org
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-- 
Dr. Ruben Santiago Montero
Associate Professor, Complutense University of Madrid

URL:    http://dsa-research.org/doku.php?id=people:ruben
Weblog: http://blog.dsa-research.org/?author=7